In Shin Megami Tensei III: Nocturne, the player takes on the role of a young boy who is caught up in the apocalypse while visiting his sick teacher, Yuko Takao, with his two classmates Chiaki Hayasaka and Isamu Nitta. The player must survive in the Vortex World with the new powers and capabilities given to the protagonist through Magatama obtained from Lucifer. With these powers, the player is given the opportunity to align themselves with a Reason that decides what the world will become.